Hydraulic working machine has at least one compression cavity between wall of sealing groove and sealing strip

摘要

The hydraulic working machine includes at least one sealing strip (13) in a sealing groove. There is at least one compression cavity (16, 17) between the wall of the sealing groove and the sealing strip. There is a recess (18) in the sealing strip to improve its sealing efficiency. This recess may connect up with the compression cavity.